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Screw-Driver. No.164.638. I Pmmmmzwm THE GRAPHIC CO.PHOTOrLITH.39 &4PARK PLACLNX.

IRVING c. oowLEs,'oF SYRACUSE, NEW YORK.

IMPROVEMENT IN SCREW-DRIVERS.

Specification forming part of Letters Patent No. 164,638, dated June 22,15575; application filed October 21, 1874.

To all whom it may concern:

Be it known that I, IRVING O. OOWLES, of Syracuse, in the county ofOnondaga and State ofNew York, have invented an Improvement in ScrewDrivers for Sewing Machines, of which the following is a specification:

The nature of my invention consists in pro viding a screw-driver uponthe lower part of each of its sides with cutting-edges for rippingseams, cutting threads, &c.

In the accompanying drawing, Figure 1 is a view of m y improvedscrew-driver. Fig. 2 represents my screw-(lriver in the operation ofripping a seam.

The part of the driver for entering the nick of the screw is formed inthe ordinary manner. A short distance to the rear of the end of thedriver I form upon each side of the blade a IRVING C. COWVLES.

\Vitn esses:

U. 0. PALMER, ABRAHAM EXs'rEIN.

